19th century musician Maurice de Raoulx has left behind a message hidden in sheet music. Can a reader decipher it?

Numerous steganographic methods have been used by prisoners of war to hide messages in letters to their families. Here’s one I didn’t know before.

Some song lyrics provided by Google’s lyrics platform contain the hidden message RED HANDED. It was encoded by competitor Genius in order to prove that Google is copying from them.

The Czech Pirate Party has hidden a short message, a so-called acrostic, in the Czech EU election ballots. Pranks like these have a long tradition.

German comedian Jan Böhmermann announced that he would present something “special” in his TV show. A steganographic message indicated that there was a relationship to the Ibiza affair. The truth proved much less spectacular.

A few years ago, online magazine “Naked Security” ran a steganography competition. The participants had to hide a given message in an inconspicuous letter using a method developed by British cipher experts in WW2. The results were quite impressing. Can a reader do better anyway?

A US magazine has published a letter containing a hidden message written by a prison inmate. The message is given, but the method used has not been published. Can a reader solve this mystery?

A few days ago, Queen Elizabeth II unveiled a new plaque that contains a hidden message. Can you break this code?

How to tell your loved one where you are, if you are a soldier and not allowed to mention your whereabouts in your letters? A German soldier in the Second World War came up with a steganographic technique.

A hidden message has been found on a paved square in Steyr, Austria. Now, the creator of this steganogram has to cover the costs for removing it.